FortiVoice for Azure supports the bring your own license (BYOL) model. You can obtain licenses through any Fortinet partner. If you do not have a partner, you can visit the Find a Partner portal to find a reseller in your region.
For assistance in purchasing a license, you can also contact firstname.lastname@example.org.
After you purchase a license or obtain an evaluation license (60-day term), you receive a PDF file with a license registration code. You will use this code when you register the FortiVoice-VM instance in Installing a valid license.